Abstract
In this study, we prepared different shapes of gold nanoparticles by the seed-mediated growth method to apply on the photoelectrode of dye-sensitized solar cells. Analyses of field emission scanning electron microscopy and ultraviolet–visible absorption spectra show that the average diameter of spherical gold nanoparticles is 66 nm and gold nanorods in aspect ratio is 2. The best conversion efficiencies of dye-sensitized solar cell with spherical gold nanoparticles and gold nanorods added in are 6.77 and 7.08%, and are higher than that without gold nanoparticles. These results indicate that the effect of gold nanoparticles on the photoelectrode can increase the conductivity and reduce the recombination of charges in the photoelectrode, resulting in the increase of conversion efficiency for dye-sensitized solar cells. Futhermore, gold nanorods have stronger surface plasmon resonance intensity than spherical gold nanoparticles at long wavelength. This may be the reason why conversion efficiency of dye-sensitized solar cells with gold nanorods is higher than that of spherical gold nanoparticles.
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Schedule a callMore From: Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanoengineering and Nanosystems
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